Mission 006
Oscillators — The Sound Source
Sine, saw, square, triangle. Pick your raw material.
Pick the right wave and you're 70% there.
+50 XP
// WHAT IT DOES
The oscillator is the part of the synth that actually generates sound. Almost every synth offers the same four classic shapes plus noise: sine, triangle, square, sawtooth.
Each shape has a built-in character because of its harmonic content. Sine has none (pure). Triangle is mellow. Square is hollow. Saw is the brightest and most flexible.
Most bass and lead patches start from a saw; pads often layer multiple saws; subs are sines or triangles; FM bells use sines modulating sines.
Think of it like → Oscillator shape is the type of paint. Filter is the brush. is the gesture. You can't paint a hard edge with thin watercolour.
▸ WHY YOU CARE
- • Choosing the wrong wave makes the rest of the patch a fight. Choosing the right wave gets you most of the way for free.
- • Recognising the four shapes by ear is one of the fastest 'sound design' skills you can build.
- • It's the same vocabulary every synth shares, from a 1971 Minimoog to a 2024 soft synth.
// SEE & HEAR IT
▸ Two oscillators blend to one waveform. Detune fattens by making them slightly out of tune.
▸ HOW IT WORKS
▸ Signal flow — watch the dot
▸ SIGNAL FLOW
Glowing dot = your signal travelling through Live.
▸ LISTEN FOR
- • Saw has presence in the upper mids — perceived as 'bright'.
- • Square has a clarinet/hollow vibe — perceived as 'nasal'.
- • Triangle is essentially a 'soft sine' — gentle.
▸ WALKTHROUGH (3 steps)
- 1. DO: Init the synth. Try each of the four shapes at the same pitch and level.▸ LISTEN: Sine = hollow, Tri = soft, Square = nasal, Saw = buzzy. Same note.
- 2. DO: Put the oscillator one below the played note.▸ LISTEN: Same shape feels heavier, more 'bass'.
- 3. DO: Add a second oscillator at the played octave + the original sub octave.▸ LISTEN: Hybrid sound — body + brightness.
▸ COMMON MISTAKES
- ✗ Picking sine for a 'fat lead' (sine has no harmonics — there's nothing for the filter to shape).
- ✗ Picking saw for a clean sub (too much harmonic content above the ).
// QUIZ (QUICK)
Question 1 / 30 correct
Which oscillator is brightest?